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Top Forums Shell Programming and Scripting Check if file exists or not Post 302889714 by Scrutinizer on Sunday 23rd of February 2014 12:00:40 PM

Old

02-23-2014

Moderator

Try:

Code:

exists() {
  [ -e "$1" ]
}

if exists $File; then
  echo "found files with pattern $File"
fi

--
@Barry, what if there are multiple files?

Scrutinizer

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plack::session::store::file

Plack::Session::Store::File(3pm)			User Contributed Perl Documentation			  Plack::Session::Store::File(3pm)

NAME

       Plack::Session::Store::File - Basic file-based session store

SYNOPSIS

	 use Plack::Builder;
	 use Plack::Middleware::Session;
	 use Plack::Session::Store::File;

	 my $app = sub {
	     return [ 200, [ 'Content-Type' => 'text/plain' ], [ 'Hello Foo' ] ];
	 };

	 builder {
	     enable 'Session',
		 store => Plack::Session::Store::File->new(
		     dir => '/path/to/sessions'
		 );
	     $app;
	 };

	 # with custom serializer/deserializer

	 builder {
	     enable 'Session',
		 store => Plack::Session::Store::File->new(
		     dir	  => '/path/to/sessions',
		     # YAML takes it's args the opposite order
		     serializer   => sub { YAML::DumpFile( reverse @_ ) },
		     deserializer => sub { YAML::LoadFile( @_ ) },
		 );
	     $app;
	 };

DESCRIPTION

       This implements a basic file based storage for session data. By default it will use Storable to serialize and deserialize the data, but
       this can be configured easily.

       This is a subclass of Plack::Session::Store and implements its full interface.

METHODS

       new ( %params )
	   The %params can include dir, serializer and deserializer options. It will check to be sure that the dir is writable for you.

       dir This is the directory to store the session data files in, if nothing is provided then "/tmp" is used.

       serializer
	   This is a CODE reference that implements the serialization logic.  The CODE ref gets two arguments, the $value, which is a HASH
	   reference to be serialized, and the $file_path to save it to.  It is not expected to return anything.

       deserializer
	   This is a CODE reference that implements the deserialization logic.	The CODE ref gets one argument, the $file_path to load the data
	   from. It is expected to return a HASH reference.

BUGS

       All complex software has bugs lurking in it, and this module is no exception. If you find a bug please either email me, or add the bug to
       cpan-RT.

AUTHOR

       Stevan Little <stevan.little@iinteractive.com>

COPYRIGHT AND LICENSE

       Copyright 2009, 2010 Infinity Interactive, Inc.

       <http://www.iinteractive.com>

       This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.12.4							    2011-07-27					  Plack::Session::Store::File(3pm)